Process for secreting fur and hair.



UNITED. STATES-- PATENT OFFICE.

noursrnnngors PARIS, or'ran'rs, rgnnncn.

Pnocns's FOR- sEcRE'riNe FUR AND 1mm.

Specification of Letters Patent.

- Patented Jan. 23, 51917.

No Drawing. Application filed March 3,-19 14, Serial Ito; 822,1'19. Renewed June 20, 1916. Serial No.

Z0 all whom it may concern.

Be it known that I, Louis FRANQOIS PARIS, citizen of. the Republic of F iance, residing at 28 Rue de Constantinople, Paris, in the Republic of France, have invented new and useful Improvements in Processes for Secreting Fur and Hair, of which the following is a specification.

This inventionrelates to a process for secreting hair intended for the of felt, without using mercury.

According to this invention the secreting is obtained by the action in a cold state or in a drying oven of compounds that are formed when the following substances aremade to react on one another in water: nitric acid, hydrochloric acid, zinc chlorid, a metallic nitrite (preferably hypochlorite (preferably of sodium). At the instant these substances are mixed simultaneous reactions are produced, that finally leave the double chlorid of 'nitrosyl and zinc in solution as well as a nitrous anhydrid and a small excess of nitric acid and hydrochloric acid. These reactions are as follows:

1. The hydrochloric acid reacts onthe hypochlorid' of sodium and produces free chlorin, sodium chlorid and water according to the formula:

ClONa+2HCl=NaOl+HQO+2CL 2. The nascent'chlorin reacts on the nitrogen bioxid produced by the decomposition of the nitrite of sodiumand forms nitrosyl chlorid:

f NO+O1=NOC1.,

3. This latter compound combines 'with the "zinc chlorid and produces a double chlorid of the formula:

- the solution of which is stable in the mesetting freenitrous anhydrid. A'large part of the latter remains as a stable solution in the medium used, as will readily be seen by the intense bluish-green tint it gives to the liquid. {A further part'is decomposed by manufacture of sodium), a metallic -occurs owingto the'use of the water and produces nitric acid and nitrogen loxld according to the formula:

' The nitrogen bioxid' -that is thus formed reacts with the free chlorin under'the condi tions above referred to and produces nitrosyl mixture,

hair. A barium or strontium salt is preferably used to precipitate as'an insoluble sulfate the free or combined sulfuric acid which impure commercial products; Thisi impurity has indeed the serious drawbackaof slightly parchment;

izing the hides and thus rendering diflicult the subsequent use of the so called vermicelli for the manufacture of glue.

The activity such. that it allows of fulling the hat bells obtained wit the-hair prepared in this man'- ner, without using sulfuric acid.

e proportions of the various substances I may vary within pretty large limits Th used without substantially modifying the secret- 1ng properties.

The following examples contain the proportions that have allowed of obtaining the best results.

Ewample IY ellow secreting liquid-In '8 liters of cold water the following substances are made to dissolve: sodium nitrite, 300 gr.; strontium nitrate, 300 r.

of the. secretingsolution is When the solution is finished 100 cc. of hypochlorite of sodium (commercial solution) are added. The following mixture is then added slowly and while stirring gently, the said mixture being prepared at the moment it is to be used nitric acid, 36, 1800 cc.; hydrochloric acid, 0rd., 500 col; zinc chlorid, (sell of 45,) 350 cc. stoving of the hides is made as in the case of mercury secreting liquid.

Emample [I -Pale secreting Zigm'd.In 8 liters ofcold water are made to dissolve:-

The brushing and' sodium nitrite, gr.; strontium nitrate,

upon the following mixture is slowly poured into the solution while stirring gently: nitric acid, 36, 500 cc.; hydrochloric acid, 1000 cc.; zinc chlorid, 45, 350 cc.

The mixturemust be prepared at the moment it is used. The brushing and drying is made as in the case of mercury secreting liquid. v

The same results are obtained with the yellow as well liquid, if the hidesare successively brushed with the separate solutions, the reactions being thus produced on the hair itself.

Having now described my invention, what I claim as new and desire to secure by Letters Patent is; A

.1. A process for secreting hair intended for the manufacture of felt, which consists in subjecting the hair to the action of'the compounds that arise when nitric acid, by-

drochloric acid, zinc chlorid, sodium nitrite and sodium hypochlorite areemade to react 1n an aqueous solution. v

2. A'process for secreting hair intended for the manufacture of felt, which consists .in subjecting the hair to the action of nias with the pale secretingtrous anhydrid, nitrosyl chlorid and a combination of the nitrosyl chlorid with a metallic chlori'd. I

3. A process for secreting hair intended for the manufacture of felt, which consists in subjecting the hair tothe action of the compounds that arise when nitric acid, hydrochloric acid, zinc chlorid, sodium nitrite and sodium hypochlorite are made to react in' anaqueous solution to which-a neutral salt has been added, substantially as 'described and for the purpose'set forth.

4. A process for secreting hair intended for the manufacture of felt, which consists in subjectingthe hair-to the action of the compounds that arise when nitric acid, by drochloric acid, zinc chlorid, sodium'nitrite and sodium hypochlorit are made to react in an aqueous solution, to which asalt of an alkaline earth has been added, substantially as described and for the purpose set forth.

In testimony whereof I have signed my a name to this specification in the presence of two subscribing witnesses.

LOUIS FRANQOIS PARIS. Witnesses ANTOINE LAVOIX, HANSON C. Coxn. 

